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COT 5611 Operating Systems Design Principles Spring 2012
Dan C. Marinescu Office: HEC 304 Office hours: M-Wd 5:00-6:00 PM
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Lecture 11 - Wednesday February 15
Reading assignment: Chapter 7 from the on-line text Last time: Network architecture – the Internet Layering Link layer 7/18/2019 Lecture 11
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Today Sharing a communication channel Multiple access protocols
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How to share a multiple access channel
Scheduled access TDMA FDMA Non-scheduled access CSMA/CD Ethernet Random Multiple Access Random multiple access Channel model: Slotted time N transmitters/receivers Only one transmitter can be successful. If two transmitter use the same slot we have a collision In a slot: S/C/I (S successful transmission, C collision; I idle slot) 7/18/2019 Lecture 11
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First Come First Served (FCFS)
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Splitting algorithms – the stack algorithm
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